Questions tagged [a4988]

The A4988 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full-, half-, quarter-, eighth-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. The A4988 includes a fixed off-time current regulator which has the ability to operate in Slow or Mixed decay modes.

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36 views

accelstepper continuous rotation with forward and backward control

I am using Uno and the A4988 driver with nema17 motor and finally the Accelstepper, I want to make the motor run endlessly in a direction, but when I press a button I want it to stop and run in the ...
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45 views

CD rom stepper getting warm

I'm trying to run a SPS-15RF stepper motor from an old cd rom drive. I'm using a CNC shield and a4988 driver with a 6v power supply. The motion is smooth and fine. I know it has 18 pulse/revolution ...
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1answer
34 views

Why does my stepper motor run when I open the Serial port?

For some reason my motor moves a certain amount every time I open the serial port without giving it any other instructions. It will move further by the same amount if I close and reopen the serial ...
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22 views

Need help with independent speed control on multiple steppers

I am a NOOB. I admit to a huge lack of understanding of programming. I just need my machine to work. I cannot wrap my head around getting independent speed control of 2 steppers since it seems that ...
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1answer
272 views

Stepper motor slow when reading from MPU 6050 sensor

I'm trying to get an inverted pendulum project working (following the instructions here), and while my stepper motor moves the cart just fine when that's the only code in the Arduino sketch, as soon ...
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1answer
719 views

Stepper Motor is not working with A4988 board

So, I have been following this tutorial on how to run a stepper motor with Arduino using an A4988 Stepper Driver. This is the tutorial: How To Control a Stepper Motor with A4988 Driver and Arduino. I ...
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0answers
92 views

Stepper motor only rotates once in a loop?

I am quite new to this , I am trying to program two motors , aStepper and bStepper. I want the program to rotate aStepper then rotate the bStepper and when that is done rotate aStepper again , and ...
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0answers
186 views

Motor keeps spinning crazily after UNO board reset

I'm using a NEMA 17 stepper motor with A4988 motor driver and Arduino Uno board. I have used full microstepping (1/16th, so one revolution = 3200 steps). I'm coming across this strange problem. ...
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1answer
1k views

Powering two stepper motors with A4988 drivers

New to this site and wanted advice and sanity checking on my project design. I know there are similar questions to this but I couldn’t find one that was closely similar to mine. I’m creating a device ...
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1answer
186 views

Are my stepper motors being burnt out? What is the issue here?

I am building a mini-cnc laser engraver as shown in this intructable and this youtube video. I have built the circuit (minus the jst connector and two male pins at the top left of the board) and have ...
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1answer
117 views

How can I pulse a stepper motor whilst also wanting to handle other tasks?

A Polulo A4988 driver board listens for a LOW -> HIGH pulse on a digital pin to step a stepper motor. A simple way to pulse this with a delay of say 100μs, is to use the delayMicroseconds function:...
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2answers
334 views

How to connect a MPU-6050 to an Arduino that already has a CNC Shield V3 on top of it?

I have a CNC Shield on top of an Arduino Uno (GRBL pinout) that controls 2 stepper motors through a4988 drivers and it is working like a charm. Now I want to add an accelerometer to it. From my ...
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1answer
946 views

Running two NEMA 17 motors, one by one, using the Arduino Uno

I am new to Arduino. I am trying to run two stepper motors NEMA 17 through respective A4988 driver and controlling via Arduino Uno. The thought is that first stepper motor will carry out a first ...
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1answer
1k views

A4988 Vref too low

I'm driving a stepper rated at 5V/1.7A using an A4988-based driver circuit with a 12V power supply. An Arduino controls the stepping sequence. According to the datasheet for my A4988, I should be ...
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1answer
164 views

Run Stepper with A4988 driver in highest resolution

I have a Bipolar Stepper Motor (12V, 350mA, 28oz-in NEMA-17) and would like to run it in the highest resolution (Sixteenth Step) with the A4988 Driver. According to multiple sources I read I need to "...
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1answer
519 views

Do I really need Ramps 1.4 for laser engraver

I'm making 2-axis laser engraver like system. Arduino waits command from pc, on receive moves laser to next coordinate and send current coordinate to pc. I have 3 step motors and I'm controlling them ...
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1answer
824 views

Stepper motor jittering

I'm trying to make a nema17 stepper motor work using ramps1.4 and A4988 driver. But when I'm trying to rotate motor, it spins with almost no torque and constant shaking. Motor 2-phase nema17 , Step ...